Flexural performance of layered macro fiber reinforced concrete beams

Yuan，Hong1,2; Fu，X. H.1; Fan，Y. C.1; Fu，Bing1,2; Zou，Q. Q.3

2022-11-28

10.1016/j.conbuildmat.2022.129314

CONSTRUCTION AND BUILDING MATERIALS   Impact Factor & Quartile

0950-0618

1879-0526

Fiber-reinforced polymer (FRP) composites have been increasingly used in various sectors, which inevitably results in an increasing amount of FRP waste to be dealt with. A recent study conducted by the authors’ group explored a novel mechanical recycling method to process glass fiber-reinforced polymer (GFRP) waste into small slender elements (referred to as “macro fibers”) for reinforcing concrete, leading to so called “macro fibre reinforced concrete” (i.e., MFRC). The macro fibres recycled from waste FRP composites shows to effectively enhance the tensile performance of the resulting concrete (e.g., tensile strength, tensile toughness), while have a negligible effect on the compressive properties of MFRC. The concept of the layered beams has been therefore adopted with the bottom layer fabricated with MFRC and the top layer with plain concrete (PC) to improve the utilization and added values of the macro fibers from the structural level. A series of tests were conducted to justify the proposed technique. Test results indicate that an increase of 4.6%, 27.6%, and 44.3% in splitting tensile strength was observed for concrete with a macro fiber content of 1%, 1.5%, and 2%, respectively. Some of other mechanical properties of the resulting concrete (e.g., the compressive toughness, flexural strength and flexural toughness) were apparently enhanced as well by the incorporation of macro fibers. In addition, the flexural performance of concrete beams shows to be superior if the macro fibers mainly concentrated in the bottom layer (i.e., a layered beam), demonstrating a higher utilization and added values of macro fibers achieved by the application of layered beams.

Fiber reinforced concrete GFRP wastes Layered beam Macro fiber Mechanical recycling

SCI

English

Others

[52178212] ; [51978176] ; [2021A1515010414]

Construction & Building Technology ; Engineering ; Materials Science

Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary

WOS:000868339900002

ELSEVIER SCI LTD

MATERIALS SCIENCE

2-s2.0-85139449519

Scopus

1.School of Mechanics and Construction Engineering,Jinan University,Guangzhou,510632,China
2.MOE Key Lab of Disaster Forecast and Control in Engineering,Jinan University,Guangzhou,510632,China
3.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yuan，Hong,Fu，X. H.,Fan，Y. C.,et al. Flexural performance of layered macro fiber reinforced concrete beams[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,357.

Yuan，Hong,Fu，X. H.,Fan，Y. C.,Fu，Bing,&Zou，Q. Q..(2022).Flexural performance of layered macro fiber reinforced concrete beams.CONSTRUCTION AND BUILDING MATERIALS,357.

Yuan，Hong,et al."Flexural performance of layered macro fiber reinforced concrete beams".CONSTRUCTION AND BUILDING MATERIALS 357(2022).